Probably the cheapest & quickest option is to go somewhere like Florida or South Africa and do an intensive course. A number of schools advertise their wares in Pilot/Flyer/Today's Pilot etc. I looked at one or two places in Florida, but opted to train in the UK. I reckoned that it may well turn out to be a false economy - you may well have to do a few hours with an instructor on your return to become familiar with UK r/t, weather etc.